CN102496775B - Ultrashort wave frequency band broadband antenna - Google Patents
Ultrashort wave frequency band broadband antenna Download PDFInfo
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- CN102496775B CN102496775B CN201110402015.7A CN201110402015A CN102496775B CN 102496775 B CN102496775 B CN 102496775B CN 201110402015 A CN201110402015 A CN 201110402015A CN 102496775 B CN102496775 B CN 102496775B
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Abstract
The invention relates to an ultrashort wave frequency band broadband antenna, comprising a first radiating body, wherein the first radiating body is fixedly connected with a second radiating body, a matched network is sealed in an installation fixing box, one end of the first radiating body is fixedly connected with the second radiating body, and one end of the second radiating body is connected with the installation fixing box. According to the invention, the matched network is sealed in the installation fixing body, and another matched network is inserted between a radio station and an antenna, thus noise interference can be reduced to a certain extent, power capacity is increased, linearity of frequency response is improved, and excellent communication effect is ensured.
Description
Technical field
The present invention relates to antenna technical field, is a kind of ultrashort wave (VHF) frequency band broadband antenna specifically, is suitable for UAV system ultrashort wave frequency hopping station.
Background technology
At present, the antenna major part that in China's UAV Communication system, ultrashort wave (VHF) frequency range is used is that blade antenna or process load the straight-bar antenna forming, and blade antenna is because its physical size is limited, and antenna gain is lower; Straight-bar antenna is owing to having introduced a part of loading element, so loss resistance strengthens, loss power increases, gain reduces, so when unmanned plane is used as trunking traffic, be difficult to meet instructions for use, the use occasion of unmanned plane is increasingly extensive simultaneously, fighting efficiency is gradually obviously with outstanding, so show in the urgent need to development of new antenna to improve tactical communication's effect.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the invention is to be to provide a kind of ultrashort wave frequency band broadband antenna, to improve the effective utilization of ultrashort wave in UAV Communication system (VHF) frequency range.
To achieve these goals, technical scheme of the present invention is:
A kind of ultrashort wave frequency band broadband antenna, comprise the first radiant body 1, the second radiant body 2, fixed bin 3 and matching network 4 are installed, one end of described the first radiant body 1 is fixedly connected with second radiant body 2, the second radiant body 2 one end connection fixed bins 3, and described matching network 4 is sealed in to be installed in fixed bin 3, the one end at locating part 9 places of the input of described matching network 4 and the second radiant body 2 is connected, and the output of matching network 4 is connected with the connector 11 that fixed bin 3 is installed.
Described matching network 4 is by printed board 15, the first inductance 16, the second inductance 17, the first electric capacity 18, the second electric capacity 19, the 3rd electric capacity 20 and line transformer 21 form, the output of matching network 4 is connected with one end of line transformer 21, the other end of line transformer 21 is connected with one end of the 3rd electric capacity 20 and one end of the first inductance 16, the other end ground connection of the earth connection of line transformer 21 and the 3rd electric capacity 20, the other end of the first inductance 16 is connected with one end of the second inductance 17 and the second electric capacity 19, the other end ground connection of the second electric capacity 19, the other end of the second inductance 17 is connected with one end of the first electric capacity 18, the other end ground connection of the first electric capacity 18.
Described line transformer 21 adopts the magnet ring of magnetic permeability u=10, with enamelled wire Double-wire parallel wound 7 circles, and the ratio mode tap that is 1: 4 according to voltage ratio.
Described the first electric capacity 18 capacitances are 47p, and the second electric capacity 19 capacitances are 24p, and the 3rd electric capacity 20 capacitances are 13p, and the first inductance 16 inductance values are 44uH, and the second inductance 17 inductance values are 9uH.
Described the first radiant body 1 comprises that the first joint 5, the first joints 5 and stainless steel wire 6 interconnect;
Described the second radiant body 2 comprises copper tubing 7, suit locating part 9, fixed cover 14 and glass reinforced plastic pipe 10 is installed, one end of described copper tubing 7 and the second joint 8 use small bore hookup wire welding, the other end suit locating part 9 of copper tubing 7, after applying epoxy resin, their surface uniform packs glass reinforced plastic pipe 10 into, again the glass reinforced plastic pipe assembling 10 is packed into fixed bin 3 is installed with one end of finite place piece 9, then by the junction of fixed cover 14 being installed being sleeved on glass reinforced plastic pipe 10 and fixed bin 3 is installed.
The operating frequency of described antenna is 30MHz～88MHz.
Wherein the first radiant body 1 is connected by helicitic texture with the second radiant body 2, forms one, adopts base drive pattern, has applied impedance matching principle, line transformer principle.
Antenna theory points out, when the input impedance of antenna and the output impedance in radio station match, high-frequency energy, all by aerial radiation, only has incident wave on feeder line, there is no reflected wave.While not mating, when namely antenna impedance is not equal to feeder line characteristic impedance, antenna just can not all absorb the high-frequency energy transmitting on feeder line, and can only absorption portion energy, the part energy of incident wave reflects formation reflected wave, the effective power that has consequently reduced transmitter, affects communication efficiency.
In this antenna, just need to guarantee the input impedance of antenna and the output impedance matched well in radio station, matching principle is that the impedance mismatching in transmission system is partly introduced matching network 4, on original discontinuous basis, introduce another kind of discontinuity, make the reflected wave of its generation, just in time interfere and offset with original reflected wave, thereby reach impedance matching.
The present invention inserts a matching network 4 between radio station and antenna again, so not only can realize impedance matching, also can reduce noise jamming to a certain extent, improve power capacity, improve the linearity of frequency response, thereby guarantee good communication efficiency, utilize Advanced Design System 2009 design impedance matching networks, select the device with good linear characteristic and resistance to high power capacity, to solve the impedance matching within the scope of working band, noise jamming, power capacity, the problems such as the linearity of frequency response, the index request of realization within the scope of working band, realized good broadband impedance matching, thereby effectively improved antenna radiation efficiency, improved antenna gain, there is easy accessibility, anti-ruining and " three is anti-" well behaved advantage, antenna meets national defence instructions for use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structure chart of antenna the first radiant body of the present invention.
Fig. 3 is the body structure figure of antenna the second radiation of the present invention.
Fig. 4 is the structure chart that antenna of the present invention is installed fixed bin.
Fig. 5 is the structure principle chart of matching network of the present invention.
Fig. 6 is the structure principle chart of line transformer of the present invention.
Fig. 7 is the circuit theory diagrams of matching network of the present invention.
Embodiment
Below structural principle of the present invention and operation principle are described further.
With reference to Fig. 1, the present invention is comprised of the first radiant body 1, the second radiant body 2, installation fixed bin 3 and matching network 4; One end of described the first radiant body 1 is fixedly connected with the second radiant body 2, second radiant body 2 one end connection fixed bins 3, described matching network 4 is sealed in to be installed in fixed bin 3, the one end at locating part 9 places of the input of described matching network 4 and the second radiant body 2 is connected, and the output of matching network 4 is connected with the connector 11 that fixed bin 3 is installed.
Wherein the first radiant body 1 is connected by thread screw structure with the second radiant body 2, forms one, adopts base drive pattern, has applied impedance matching principle, line transformer principle; Select the device with good linear characteristic and resistance to high power capacity, to solve the problems such as the linearity of antenna height problem and the impedance matching within the scope of working band, noise jamming, power capacity, frequency response simultaneously.
Matching network 4 is screwed is installing fixed bin 3 the insides, then fills with blowing agent.
With reference to Fig. 2, antenna radiator 1 of the present invention consists of the first joint 5 and stainless steel wire 6 welding.
With reference to Fig. 3, antenna the second radiant body 2 of the present invention consists of copper tubing 7, the second joint 8, locating part 9, glass reinforced plastic pipe 10 and installation fixed cover 14, the small bore hookup wire welding of one end of described copper tubing 7 and the second joint 8 use suitable lengths, the other end suit locating part 9 of copper tubing 7, after applying epoxy resin, their surface uniform packs glass reinforced plastic pipe 10 into, again the glass reinforced plastic pipe assembling 10 is packed into fixed bin 3 is installed with one end of finite place piece 9, then by the junction of fixed cover 14 being installed being sleeved on glass steel pipe 10 and fixed bin 3 is installed.
With reference to Fig. 4, fixed bin 3 is installed to be consisted of box body 12, cover plate 13 and connector 11, after the surface of the second radiant body 2 bottoms and the surface-coated epoxy resin of installation fixed cover 14, pack into fixed bin 3 is installed, connector 11 is screwed and is being installed on fixed bin 3; Connector 11 plays transmitting radio frequency signal, as external interface of the present invention, with radio frequency cable, radio station is connected with the present invention.
With reference to Fig. 5, Fig. 6 and Fig. 7, described matching network 4 is by printed board 15, the first inductance 16, the second inductance 17, the first electric capacity 18, the second electric capacity 19, the 3rd electric capacity 20 and line transformer 21 form, described the first inductance 16, the second inductance 17, the first electric capacity 18, the second electric capacity 19, the three electric capacity 20 are installed in printed board 15;
The output of described matching network 4 is connected with one end (A end) of line transformer 21, the other end of line transformer 21 (B end) is connected with one end of the 3rd electric capacity 20 and one end of the first inductance 16, the other end ground connection of the earth connection of line transformer 21 and the 3rd electric capacity 20, the other end of the first inductance 16 is connected with one end of the second inductance 17 and the second electric capacity 19, the other end ground connection of the second electric capacity 19, the other end of the second inductance 17 is connected with one end of the first electric capacity 18, the other end ground connection of the first electric capacity 18.
The first electric capacity 18 capacitances are 47p, and the second electric capacity 19 capacitances are 24p, and the 3rd electric capacity 20 capacitances are 13p, and the first inductance 16 inductance values are 44uH,, the second inductance 17 inductance values are 9uH.
Described line transformer 21 adopts the magnet ring of magnetic permeability u=10, with enamelled wire Double-wire parallel wound 7 circles of 0.5mm, and the ratio mode tap that is 1: 4 according to voltage ratio.
Operation principle of the present invention is: the output impedance in radio station is 50 Ω, in order to reach antenna maximum power transfer, the input impedance of antenna need match with the output impedance in radio station, the characteristic impedance that is antenna is also required to be 50 Ω, introduce matching network 4, the first radiant body 1 and the second radiant body 2 are accepted outside electromagnetic signal, and after matching network 4 is processed, making characteristic impedance of antenna is also 50 Ω.
This impedance matching network efficiently solves the broadband resistance matching problem of antenna, and selected device all has good linear characteristic and higher power capacity.
Antenna of the present invention is through actual measurement, and within the scope of 30～88MHz, aerial voltage standing-wave ratio is less than 4.5, and be greater than-4dB of gain meets the index request of omnidirectional's military antenna.
Claims (1)
1. a ultrashort wave frequency band broadband antenna, comprise the first radiant body (1), the second radiant body (2), fixed bin (3) and matching network (4) are installed, it is characterized in that, , one end of described the first radiant body (1) is fixedly connected with the second radiant body (2), the second radiant body (2) one end connection fixed bin (3), described matching network (4) is sealed in to be installed in fixed bin (3), the one end at locating part (9) place of the input of described matching network (4) and the second radiant body (2) is connected, the output of matching network (4) is connected with the connector (11) that fixed bin (3) is installed,
Described the first radiant body (1) comprises the first joint (5), and the first joint (5) and stainless steel wire (6) interconnect;
Described the second radiant body (2) comprises copper tubing (7), suit locating part (9), fixed cover (14) and glass reinforced plastic pipe (10) are installed, small bore hookup wire welding for one end of described copper tubing (7) and the second joint (8), the other end suit locating part (9) of copper tubing (7), after applying epoxy resin, their surface uniform packs glass reinforced plastic pipe (10) into, one end of the glass reinforced plastic pipe assembling (10) band finite place piece (9) is packed into fixed bin (3) is installed, the junction that fixed cover (14) is sleeved on glass steel pipe (10) and fixed bin (3) is installed will be installed again,
The operating frequency of described antenna is 30MHz～88MHz;
Described matching network (4) is by printed board (15), the first inductance (16), the second inductance (17), the first electric capacity (18), the second electric capacity (19), the 3rd electric capacity (20) and line transformer (21) form, the output of matching network (4) is connected with one end of line transformer (21), the other end of line transformer (21) is connected with one end of the 3rd electric capacity (20) and one end of the first inductance (16), the other end ground connection of the earth connection of line transformer (21) and the 3rd electric capacity (20), the other end of the first inductance (16) is connected with one end of the second inductance (17) and the second electric capacity (19), the other end ground connection of the second electric capacity (19), the other end of the second inductance (17) is connected with one end of the first electric capacity (18), the other end ground connection of the first electric capacity (18),
Described line transformer (21) adopts the magnet ring of magnetic permeability u=10, with enamelled wire Double-wire parallel wound 7 circles, and the ratio mode tap that is 1:4 according to voltage ratio;
Described the first electric capacity (18) capacitance is 47p, and the second electric capacity (19) capacitance is 24p, and the 3rd electric capacity (20) capacitance is 13p, and the first inductance (16) inductance value is 44uH,, the second inductance (17) inductance value is 9uH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402015.7A CN102496775B (en) | 2011-12-07 | 2011-12-07 | Ultrashort wave frequency band broadband antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402015.7A CN102496775B (en) | 2011-12-07 | 2011-12-07 | Ultrashort wave frequency band broadband antenna |
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| CN102496775A CN102496775A (en) | 2012-06-13 |
| CN102496775B true CN102496775B (en) | 2014-08-13 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780077A (en) * | 2012-07-18 | 2012-11-14 | 苏州市吴通天线有限公司 | Broadband cylindrical antenna |
| CN102868019B (en) * | 2012-09-29 | 2014-12-24 | 宝鸡烽火诺信科技有限公司 | U-shaped VHF (very high frequency) antenna of unmanned aerial vehicle |
| CN103165977B (en) * | 2013-04-12 | 2015-09-09 | 西安电子科技大学 | Ultra-short wave broadband omnidirectional antenna |
| CN110571510A (en) * | 2019-08-28 | 2019-12-13 | 陕西烽火诺信科技有限公司 | Helicopter ultrashort wave conformal antenna |
| CN110767998A (en) * | 2019-12-03 | 2020-02-07 | 广东尚卓通信科技有限公司 | UHF miniaturized omnidirectional antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0738316A (en) * | 1993-07-26 | 1995-02-07 | Harada Ind Co Ltd | Elexible type antenna for portable telephone set |
| EP2266161B1 (en) * | 2008-04-25 | 2017-09-06 | Wispry, Inc. | Tunable matching network circuit topology selection |
| CN201498590U (en) * | 2009-09-21 | 2010-06-02 | 中国电子科技集团公司第五十四研究所 | High-efficiency ultra-high frequency vehicle-mounted antenna |
| CN102157772B (en) * | 2010-12-08 | 2014-04-09 | 宝鸡烽火诺信科技有限公司 | Vehicle-mounted ultrashort wave wide antenna |
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Address after: 721000 New Village No. 41 Yuquan Road, Baoji High-tech Development Zone, Shaanxi Province Patentee after: Shaanxi Fenghuo Noxin Technology Co., Ltd. Address before: 721006 No. 72 Qingjiang Road, Baoji City, Shaanxi Province Patentee before: Baoji Fenghuo Nordson Technology Co., Ltd. |
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